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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* A unique per-element set of attributes that is used as an
* nsIStyleRule; used to implement presentational attributes.
*/
#ifndef nsMappedAttributes_h___
#define nsMappedAttributes_h___
#include "nsAttrAndChildArray.h"
#include "nsMappedAttributeElement.h"
#include "nsIStyleRule.h"
#include "mozilla/Attributes.h"
#include "mozilla/MemoryReporting.h"
class nsIAtom;
class nsHTMLStyleSheet;
class nsMappedAttributes final : public nsIStyleRule
{
public:
nsMappedAttributes(nsHTMLStyleSheet* aSheet,
nsMapRuleToAttributesFunc aMapRuleFunc);
// Do not return null.
void* operator new(size_t size, uint32_t aAttrCount = 1) CPP_THROW_NEW;
nsMappedAttributes* Clone(bool aWillAddAttr);
NS_DECL_ISUPPORTS
void SetAndSwapAttr(nsIAtom* aAttrName, nsAttrValue& aValue,
bool* aValueWasSet);
const nsAttrValue* GetAttr(nsIAtom* aAttrName) const;
const nsAttrValue* GetAttr(const nsAString& aAttrName) const;
uint32_t Count() const
{
return mAttrCount;
}
bool Equals(const nsMappedAttributes* aAttributes) const;
uint32_t HashValue() const;
void DropStyleSheetReference()
{
mSheet = nullptr;
}
void SetStyleSheet(nsHTMLStyleSheet* aSheet);
nsHTMLStyleSheet* GetStyleSheet()
{
return mSheet;
}
const nsAttrName* NameAt(uint32_t aPos) const
{
NS_ASSERTION(aPos < mAttrCount, "out-of-bounds");
return &Attrs()[aPos].mName;
}
const nsAttrValue* AttrAt(uint32_t aPos) const
{
NS_ASSERTION(aPos < mAttrCount, "out-of-bounds");
return &Attrs()[aPos].mValue;
}
// Remove the attr at position aPos. The value of the attr is placed in
// aValue; any value that was already in aValue is destroyed.
void RemoveAttrAt(uint32_t aPos, nsAttrValue& aValue);
const nsAttrName* GetExistingAttrNameFromQName(const nsAString& aName) const;
int32_t IndexOfAttr(nsIAtom* aLocalName) const;
// nsIStyleRule
virtual void MapRuleInfoInto(nsRuleData* aRuleData) override;
virtual bool MightMapInheritedStyleData() override;
virtual bool GetDiscretelyAnimatedCSSValue(nsCSSPropertyID aProperty,
nsCSSValue* aValue) override;
#ifdef DEBUG
virtual void List(FILE* out = stdout, int32_t aIndent = 0) const override;
#endif
size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
private:
nsMappedAttributes(const nsMappedAttributes& aCopy);
~nsMappedAttributes();
struct InternalAttr
{
nsAttrName mName;
nsAttrValue mValue;
};
const InternalAttr* Attrs() const
{
return reinterpret_cast<const InternalAttr*>(mAttrs);
}
InternalAttr* Attrs()
{
return reinterpret_cast<InternalAttr*>(mAttrs);
}
uint16_t mAttrCount;
#ifdef DEBUG
uint16_t mBufferSize;
#endif
nsHTMLStyleSheet* mSheet; //weak
nsMapRuleToAttributesFunc mRuleMapper;
void* mAttrs[1];
};
#endif /* nsMappedAttributes_h___ */
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